wasn't he the watchmaker guy?

No, aquinas made the theory about God i.e that God is God is simple, without composition of parts, such as body and soul, or matter and form. God is perfect, lacking nothing. That is, God is distinguished from other beings on account of God's complete actuality. God is infinite. That is, God is not infinite in the ways that created beings are physically, intellectually, and emotionally limited. This infinity is to be distinguished from infinity of size and infinity of number. God is immutable, incapable of change on the levels of God's essence and character. God is one, without diversification within God's self. The unity of God is such that God's essence is the same as God's existence. In Aquinas's words, "in itself the proposition 'God exists' is necessarily true, for in it subject and predicate are the same."

oh, the "God is real because God is real" guy.

Pretty much p.s william paley was the watch guy he brought the design argument to the table

thanks.